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Visualization of ATP Synthase Dimers in Mitochondria by Electron Cryo-tomography
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Retroviral RNA Dimerization: From Structure to Functions.

Noé Dubois1, Roland Marquet1, Jean-Christophe Paillart1

  • 1Architecture et Réactivité de l'ARN, UPR 9002, IBMC, CNRS, Université de Strasbourg, Strasbourg, France.

Frontiers in Microbiology
|April 7, 2018
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Summary

Retroviruses use genomic RNA (gRNA) dimerization for viral replication and immune evasion. This review details the structural signals and mechanisms of gRNA dimer formation across various retroviruses.

Keywords:
HIVMuLVRNAdimerizationfunctionretrovirusstructure

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Area of Science:

  • Virology
  • Molecular Biology
  • RNA Structure

Background:

  • Retroviral genomes consist of two identical genomic RNA (gRNA) molecules.
  • gRNA dimerization, the non-covalent linking of two gRNA molecules, is essential for the retroviral life cycle.
  • This process is conserved across most retroviruses and contributes to immune evasion and drug resistance.

Purpose of the Study:

  • To review the structural features of dimerization signals in various retroviruses.
  • To summarize the mechanisms of RNA dimer formation.
  • To discuss the functional implications of dimerization in the retroviral cycle.

Main Methods:

  • Literature review of studies on retroviral gRNA dimerization.
  • Analysis of structural data for dimerization signals.
  • Synthesis of information on RNA dimer formation mechanisms and functional roles.

Main Results:

  • Identified conserved structural features of dimerization signals across retroviruses like HIV, MLV, and RSV.
  • Described mechanisms of intermolecular base-pairing leading to gRNA dimer formation.
  • Highlighted the role of RNA switches in regulating dimerization, translation, and packaging.

Conclusions:

  • Retroviral gRNA dimerization is a critical, conserved step with significant implications for viral evolution and infectivity.
  • Understanding dimerization mechanisms provides insights into viral replication and potential therapeutic targets.
  • Further research into spatio-temporal dimerization and RNA switches will enhance our knowledge of the retroviral life cycle.